SHARK VS SHARK

CladoselachevsWhitetip reef shark

Length, weight and bite evidence—plus context from a human, city bus and blue whale. Every number below carries its uncertainty with it.

ExtinctCladoselache fyleri×LivingTriaenodon obesus
QUICK VERDICT

Whitetip reef shark is about 1.18× longer by these reference values.

Whitetip reef shark uses a 2.13 m upper reference, compared with 1.8 m for Cladoselache. A clean mass ratio is not shown because at least one weight is not reliably reconstructed.

01

ON THE SAME SCALE

Human. Bus. Whale.
Pick your reference.

RELATIVE LENGTH · 0–24 METERS
ACladoselacheabout 1.8 m / 6 ft
BWhitetip reef sharkreported to 2.13 m / 7 ft
REFAdult human1.8 m · about 80 kg

Length bars use upper comparison values and do not show body depth, tail proportion or typical adult size. A long thresher tail, for example, does not equal whale-shark body mass.

02

THE NUMBERS

Side by side.

MeasureCladoselacheWhitetip reef shark
Length referenceabout 1.8 m / 6 ftreported to 2.13 m / 7 ft
Weight referenceNot reliably reconstructedreported near 18.3 kg / 40 lb
Bite forceNo defensible estimate usedUnknownNo dependable maximum foundUnknown
Timeabout 370 million years agoTropical Indo-Pacific reefs
DietSmall fishesOctopus, fishes and crustaceans
03

WHAT THE DATA CAN SAY

Size is not the whole animal.

Length and weight

Cladoselache is represented by about 1.8 m / 6 ft; Whitetip reef shark by reported to 2.13 m / 7 ft. Calling it a modern-style shark hides major evolutionary distance. The species is usually smaller than its reported maximum.

Bite evidence

Cladoselache: No usable maximum-force model exists. Whitetip reef shark: No standardized maximum is used.

Living versus extinct

At least one animal is known from fossils. Fossil length, weight and bite estimates depend on which living analogues and scaling equations researchers choose.

Ecology changes the matchup

It was an early shark-like chondrichthyan with a streamlined body. Its slim body lets it hunt inside reef crevices.

04

TRACE THE CLAIMS

Sources and limits.

CladoselacheSmithsonian National Museum of Natural HistoryWhitetip reef sharkFlorida MuseumHow we standardize comparisonsRead the methodology →